I would rate the stick I got as just ok.
Only runs at Cas 2.5, not Cas 2.0 even at 266 Mhz.
Runs OK at 182.5 Mhz default voltage, but I had to set my Epox (p4-SIS chipset) board to normal memory times, would lock up with Fast/Turbo/Ultra timmings @ 182.5 Mhz. That's also the limit of my 1.6a chip, so it was good enough for me.
Still gives me great memory benchmarks
Sandra Memory benchmarks (2002 version)
INT 2757
Float 2765